Building a Marsbase is a Horrible Idea: Let’s do it!

Kurzgesagt – In a Nutshell

AI-assisted summary of Building a Marsbase is a Horrible Idea: Let’s do it! — original source. Check the original for full context.

Source published: 2019-02-03

Key ideas

Establishing a semi-permanent Mars outpost faces severe environmental hurdles, including toxic perchlorate-laced regolith, surface radiation doses 50 times higher than Earth's, and an atmosphere just 1% as dense as Earth's. (0:00)
Renewable power is largely impractical on Mars due to weak sunlight, global dust storms, negligible wind density, and a cold planetary core, making Earth-supplied nuclear reactors the only viable short-term power source. (1:43)
Habitats must be designed as windowless, rounded mounds buried under dry ice and a meter of local dirt to survive internal atmospheric pressure and deep-space radiation. (3:04)
Because orbital alignment allows travel between Earth and Mars only once every two years, an outpost would remain critically vulnerable to supply chain failures and emergencies. (6:43)

Detailed notes

## Background Published on YouTube by Kurzgesagt – In a Nutshell on February 3, 2019, this video breaks down the daunting realities of human colonization on the Red Planet. As noted in the video's description, humanity's innate drive to explore leads us to embrace even the most hostile environments, prompting an investigation into how building a functioning Mars base would actually work and how nerve-wracking the endeavor would be.

## TL;DR While Mars appears superficially hospitable, it is a freezing, radioactive desert with toxic soil, an unbreathable atmosphere, and severe energy shortages that necessitate Earth-supplied nuclear power. To survive, pioneers must live in rounded, windowless pressurized bunkers buried beneath frozen carbon dioxide and dirt, utilizing teleoperated rovers and rear-docking spacesuits to minimize radiation and toxic dust exposure. Astronauts face bodily deterioration from 38% gravity, psychological strain from long-term sensory deprivation, and a precarious supply line tied to planetary launch windows occurring only once every two years. Despite these brutal conditions, mastering this grueling outpost phase represents the critical gateway toward establishing a permanent multi-planetary civilization.

## Atmosphere & style The presentation pairs Kurzgesagt's crisp, colorful aesthetic and Steve Taylor's measured, analytical narration with an unflinching and darkly humorous dose of scientific reality. It systematically deconstructs romantic sci-fi tropes, evoking a genuine sense of claustrophobia as it describes astronauts trapped in buried, windowless tunnels facing lethal dust and years-long isolation. Despite the grim technical hurdles and the chilling prospect of resupply ships arriving to find a dead colony, the video ultimately pivots to an exhilarating, hopeful celebration of human stubbornness and exploratory ambition.

## Bulletin - [00:00](https://www.youtube.com/watch?v=uqKGREZs6-w&t=0s) Establishing a semi-permanent Mars outpost faces severe environmental hurdles, including toxic perchlorate-laced regolith, surface radiation doses 50 times higher than Earth's, and an atmosphere just 1% as dense as Earth's. - [01:43](https://www.youtube.com/watch?v=uqKGREZs6-w&t=103s) Renewable power is largely impractical on Mars due to weak sunlight, global dust storms, negligible wind density, and a cold planetary core, making Earth-supplied nuclear reactors the only viable short-term power source. - [03:04](https://www.youtube.com/watch?v=uqKGREZs6-w&t=184s) Habitats must be designed as windowless, rounded mounds buried under dry ice and a meter of local dirt to survive internal atmospheric pressure and deep-space radiation. - [06:43](https://www.youtube.com/watch?v=uqKGREZs6-w&t=403s) Because orbital alignment allows travel between Earth and Mars only once every two years, an outpost would remain critically vulnerable to supply chain failures and emergencies.

## Key takeaways - [00:00](https://www.youtube.com/watch?v=uqKGREZs6-w&t=0s) Mars appears deceptively welcoming at first glance with its polar ice caps and comparable day length, but it is actually a freezing, radioactive desert with unbreathable air and toxic soil. - [00:00](https://www.youtube.com/watch?v=uqKGREZs6-w&t=0s) Establishing a semi-permanent outpost represents the grueling 'Phase Two' of colonization, which must precede any ambitious long-term plans to terraform Mars. - [01:43](https://www.youtube.com/watch?v=uqKGREZs6-w&t=103s) Solar energy on Mars operates at only 40% of terrestrial efficiency and is regularly disrupted by massive dust storms, while wind and geothermal alternatives remain unviable. - [01:43](https://www.youtube.com/watch?v=uqKGREZs6-w&t=103s) Initial Martian settlements will depend entirely on nuclear reactors and fuel transported from Earth due to the lack of easily accessible local radioactive minerals. - [01:43](https://www.youtube.com/watch?v=uqKGREZs6-w&t=103s) Habitats must be built with rounded, smooth profiles to withstand the extreme pressure differential created by pressurizing a breathable atmosphere inside a 1% density CO2 environment. - [03:04](https://www.youtube.com/watch?v=uqKGREZs6-w&t=184s) Mars lacks a protective magnetic field and dense atmosphere, exposing unshielded surface explorers to 50 times the radiation experienced on Earth and exceeding astronauts' lifetime radiation limits in just three years. - [03:04](https://www.youtube.com/watch?v=uqKGREZs6-w&t=184s) Habitats require radiation shielding made from frozen atmospheric carbon dioxide and a one-meter layer of local soil, turning living quarters into windowless underground bunkers. - [03:04](https://www.youtube.com/watch?v=uqKGREZs6-w&t=184s) Martian dust is electrostatically charged, fine enough to breach mechanical seals, and contaminated with dangerous perchlorate salts, necessitating external spacesuit docking ports. - [04:48](https://www.youtube.com/watch?v=uqKGREZs6-w&t=288s) Farming on Mars requires decontaminating alkaline soil, washing out toxic perchlorate salts, and supplementing it with biological waste, though closed-loop aquaponics provides a viable dietary alternative. - [04:48](https://www.youtube.com/watch?v=uqKGREZs6-w&t=288s) Mars' surface gravity is only 38% of Earth's, triggering progressive muscle atrophy, bone density loss, and cardiovascular deterioration that require continuous exercise to mitigate. - [04:48](https://www.youtube.com/watch?v=uqKGREZs6-w&t=288s) Confinement in cramped, windowless tubes with repetitive tasks and extreme sensory deprivation demands psychological screening similar to Antarctic expeditions or submarine crews. - [06:43](https://www.youtube.com/watch?v=uqKGREZs6-w&t=403s) The supply line between Earth and Mars is constrained by orbital mechanics that only permit travel windows once every two years, leaving colonists helpless in rapid-onset crises. - [06:43](https://www.youtube.com/watch?v=uqKGREZs6-w&t=403s) Despite the extreme risks and hostile conditions, enduring the brutal outpost phase is the essential prerequisite to building an interplanetary civilization and terraforming a second world.

## Detailed walkthrough ### [00:00](https://www.youtube.com/watch?v=uqKGREZs6-w&t=0s) The Grim Reality of the Red Planet

Humanity is an expansionist species that spreads into every available niche, from blistering deserts and lonely islands to the highest mountain ranges. Establishing a foothold on Mars and building the first permanent colony outside Earth—or even eventually terraforming it into a second blue world—feels like a natural continuation of that drive. However, long before grand visions of terraforming can materialize, humanity must complete the grueling "Phase Two" of colonization: establishing a semi-permanent outpost to lay the infrastructure for a larger presence.

At first glance, Mars seems oddly welcoming, featuring polar ice caps, sprawling valleys, subsurface liquid water, and a day length only slightly longer than Earth's. In reality, that appearance is deceptive:

> “Mars is awful.”

The Red Planet is a freezing, radioactive desert where the soil is poisonous, breathing is impossible, and daily existence is intensely stressful. The pioneers who take on the challenge will face unprecedented problems, though there are plenty of volunteers willing to go, supported by existing technologies. For the purpose of planning an outpost, the scenario assumes previous scouting missions have identified a site, stockpiled preliminary tools and resources, and that an active Moon base already operates as a mission hub.

---

[01:43](https://www.youtube.com/watch?v=uqKGREZs6-w&t=103s) Energy Poverty and Atmospheric Containment

The immediate obstacle facing any outpost is severe energy poverty. Due to its distance from the Sun, Mars receives solar energy that is only 40% as effective as on Earth, and even this weakened sunlight is regularly blotted out for days at a time by massive dust storms. Other renewable solutions fall short: wind turbines are useless in an atmosphere with barely any density, and geothermal energy is unviable because the planet's interior is far too cold.

```mermaid flowchart TD accTitle: Mars Outpost Energy Constraints accDescr: Flowchart showing why renewables fail on Mars and why Earth-supplied nuclear power is required. subgraph S1["Environmental Realities"] A["Weak Sunlight<br/>(40% of Earth's)"] B["Massive Global Dust Storms"] C["Thin Atmosphere & Cold Core"] end subgraph S2["Power Source Failures"] D["Solar Insufficient Alone"] E["Wind & Geothermal Unfeasible"] end subgraph S3["Initial Solution"] F["Earth-Supplied Nuclear Reactor & Fuel"] end A --> D B --> D C --> E D --> F E --> F ```

As a result, nuclear power represents the only practical short-term choice. Because Mars lacks readily accessible radioactive minerals, both the nuclear reactor and its fuel must be transported across space from Earth to sustain the base during its early operational years.

Energy alone means nothing if the crew cannot breathe. Mars' atmosphere has only 1% the density of Earth's and consists primarily of carbon dioxide ($CO_2$). Habitats must therefore be artificially pressurized with an oxygen and nitrogen blend. To withstand the massive differential pressure between the inside and outside, structures cannot have standard corners or flat surfaces, which act as structural weak points; instead, they must be constructed with rounded, smooth profiles, accompanied by flawlessly reliable, airtight airlocks.

- Mars surface solar power efficiency: 40% of terrestrial levels - Atmospheric density: roughly 1% of Earth's, dominated by $CO_2$ - Habitat design requirement: rounded, smooth shapes to survive pressure strain without rupturing

---

[03:04](https://www.youtube.com/watch?v=uqKGREZs6-w&t=184s) Radiation, Mars Dust, and Toxic Regolith

Lacking both a strong intrinsic magnetosphere and a dense atmosphere, Mars offers almost no defense against deep-space radiation, allowing half of all incoming radiation to reach ground level. A human standing unprotected on the surface absorbs 50 times the radiation dose they would on Earth. In fact, spending just three years on the Martian surface exceeds the maximum lifetime radiation limit permitted for NASA astronauts over their entire professional careers, massively elevating cancer risks.

```mermaid flowchart LR accTitle: Radiation Shielding Strategy accDescr: Process of shielding habitats using local atmospheric CO2 and Martian dirt to create windowless bunkers. A["Harvest Atmospheric CO2"] --> B["Freeze into Thick Dry Ice Shell"] B --> C["Bury Under 1 Meter of Dirt"] C --> D["Windowless, Burial-Mound Habitats"] D --> E["Radiation Lowered to Survivable Levels"] ```

To engineer passive radiation shielding, habitats can be coated in a dense outer shell of frozen carbon dioxide extracted straight from the air, topped off with a one-meter layer of local dirt. While this reduces radiation exposure to levels survivable over long durations, it extracts a heavy psychological price:

> “From the inside, most living spaces will be windowless tunnels. From the outside, they'll look like burial mounds.”

Because this shielding offers zero protection outdoors, routine physical tasks on the surface will be assigned to remote-controlled teleoperated rovers, keeping personnel sealed inside. Remaining indoors also limits contact with Martian dust. Far finer than terrestrial sand, Martian dust slips inside mechanical gears and sensitive electronics. In addition, the dry environment gives the particles a strong electrostatic charge, causing them to cling tenaciously to spacesuits and gear.

Martian dust poses a severe chemical threat: the soil contains dangerous concentrations of toxic perchlorate salts, making chronic inhalation potentially fatal. To minimize contamination inside the living quarters, spacesuits could be configured to dock externally to the habitat wall, allowing astronauts to climb into the suit directly through a rear hatch without ever carrying the contaminated exterior fabric into the living quarters.

---

[04:48](https://www.youtube.com/watch?v=uqKGREZs6-w&t=288s) Feeding the Crew, Low Gravity, and Isolation

While water can be extracted from thick glacial sheets if the settlement is situated near the Martian poles, food production presents severe agronomic challenges. Martian soil is alkaline and devoid of the fixed nitrogen compounds essential for plant biology. Removing toxic perchlorate salts from the regolith is a slow, costly, and energy-hungry process. Even after decontamination, the dirt must be enriched with recycled biological waste before crops can be sown. As an alternative, closed-loop aquaponics systems could cultivate fish and crops concurrently, enriching the astronauts' diet with better flavor and fresh nutrients, which provides a critical morale boost for an isolated, exhausted crew.

An even deeper physiological hurdle is gravity:

> “Mars has only 38 percent of Earth's surface gravity, which could cause muscle-wasting, bone loss, and cardiovascular problems.”

Until rotating centrifugal living quarters are developed, astronauts must rely on rigorous daily exercise routines simply to slow the rate of bodily decay. Furthermore, personnel will be forced to spend years confined in cramped, windowless tubes alongside the exact same people, running repetitive maintenance cycles day in and day out with limited contact with Earth. Much like scientists wintering at Antarctic research bases or crew members on long submarine patrols, potential Martian pioneers must endure rigorous psychological screening to weed out anyone who cannot withstand prolonged sensory deprivation and isolation.

- Martian surface gravity: 38% of Earth's gravity - Primary health risks: progressive bone demineralization, muscle atrophy, and cardiovascular decline - Psychological stressors: confinement in windowless tunnels, strict daily monotony, isolation, and high-stakes operational stress

---

[06:43](https://www.youtube.com/watch?v=uqKGREZs6-w&t=403s) The Razor-Thin Supply Line and the Dream of a Multi-Planetary Future

Once built, an initial base could potentially endure for several decades, but it remains utterly dependent on regular shipments of spare components, nuclear reactor fuel, replacement crews, and specialized resources sent from Earth. The celestial mechanics connecting the two planets make this supply chain extraordinarily fragile. Earth and Mars are separated by tens of millions of kilometers, aligning favorably for launch windows only once every two years.

> “If there's an emergency in the colony, Earth wouldn't be able to help until the next travel window opens. Helpers may arrive on a planet filled with corpses.”

Establishing Phase Two of colonization is arguably the most brutal endeavor humanity will ever undertake. Yet human stubbornness and an innate appetite for extreme frontiers make it an irresistible challenge. Pushing past this punishing initial stage unlocks the possibility of a bustling interplanetary civilization: cities glowing across the dark Martian plains, orbital space manufacturing networks, deep-space transfer hubs, and the long terraforming effort needed to secure a multi-planetary future for humankind.

## Notable quotes > [06:43](https://www.youtube.com/watch?v=uqKGREZs6-w&t=403s) If there's an emergency in the colony, Earth wouldn't be able to help until the next travel window opens. Helpers may arrive on a planet filled with corpses. — Steve Taylor

> [04:48](https://www.youtube.com/watch?v=uqKGREZs6-w&t=288s) Mars has only 38 percent of Earth's surface gravity, which could cause muscle-wasting, bone loss, and cardiovascular problems. — Steve Taylor

## Mentioned Kurzgesagt – In a Nutshell, Steve Taylor, Epic Mountain, NASA, Mars, Earth, Moon

## Video description Get your Mars Base Poster here: shop.kurzgesagt.org

Humans love to explore. Strangely enough even horrible places – like Mars. Let’s see how building a Mars base could work and how insanely nerve-wracking exactly it would be.

Sources & Further Reading: https://sites.google.com/view/sourcesmars/

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中文简报

建立火星基地是个糟糕透顶的主意：但我们还是去做吧！尽管火星表面上看起来似乎宜居，但它实际上是一个极度寒冷、充满辐射的荒漠，土壤有毒，大气无法呼吸，且存在严重的能源匮乏问题，必须依赖地球供应的核电。为了生存，先驱者们必须生活在掩埋于干冰和泥土之下的圆形无窗加压地堡中，利用遥控漫游车和后背对接式宇航服，以最大程度减少辐射和有毒粉尘的接触。宇航员不仅要面对仅有地球38%重力导致的身体机能退化，还要承受长期感官剥夺带来的心理压力，以及因每两年才出现一次的行星发射窗口而极度脆弱的补给线。尽管环境极其恶劣，但克服这一艰难的前哨站阶段，是迈向建立永久性多行星文明的关键通道。建立半永久性火星前哨站面临严峻的环境障碍，包括含有毒高氯酸盐的风化层、高达地球50倍的地表辐射剂量，以及密度仅为地球1%的大气层。 (0:00) 由于阳光微弱、全球性沙尘暴、风密度微乎其微以及地核冷却，可再生能源在火星上基本不切实际，这使得地球提供的核反应堆成为短期内唯一可行的能源来源。 (1:43) 为承受内部大气压力和深空辐射，栖息地必须设计为掩埋在干冰和一米厚当地泥土之下的无窗圆形土丘。 (3:04) 由于轨道对齐每两年才允许一次地火间的往返，前哨站在面对供应链故障和突发紧急情况时将极其脆弱。 (6:43)

Reading summary

Kurzgesagt argues that while human expansionist drive makes establishing a Mars outpost tempting, the planet's severe environmental, physiological, and logistical hurdles make an early base extraordinarily punishing and dependent on Earth. Power Scarcity and Pressurized Habitat Engineering (1:43) A Martian base faces immediate energy poverty because surface solar power operates at only 40% of terrestrial efficiency and is frequently obstructed by planet-wide dust storms. Alternative renewable sources offer little relief: wind power is unusable within an atmospheric density roughly 1% of Earth's, and geothermal energy is unviable due to the planet's cold interior. Consequently, the outpost must rely on nuclear reactors and fuel shipped directly from Earth during its initial operational phase. Atmospheric containment poses an equally acute structural challenge. The Martian atmosphere is predominantly carbon dioxide, requiring living modules to be pressurized with an artificial oxygen-nitrogen mixture. Because the extreme pressure differential creates severe structural stress, habitats cannot feature standard flat walls or corners, which act as weak points; engineers must design smooth, rounded structures supported by fail-safe airlocks. Radiation Hazards and Toxic Electrostatic Dust (3:04) Because Mars lacks a dense atmosphere and a strong intrinsic magnetosphere, half of all deep-space radiation reaches the surface, delivering an unshielded dose 50 times greater than on Earth. Spending three years on the surface exceeds NASA's career radiation limit for astronauts, significantly elevating cancer risks. To build survivable habitats, crews must bury windowless structures under a shell of frozen atmospheric carbon dioxide and a one-meter layer of Martian dirt, transforming living quarters into bunker-like mounds while surface tasks are delegated to teleoperated rovers. Outside operations are further complicated by the soil's physical and chemical makeup. Martian dust is highly abrasive, electrostatically charged, and easily penetrates mechanical seals. Furthermore, the regolith contains hazardous concentrations of toxic perchlorate salts that make chronic inhalation dangerous. Preventing this dust from contaminating the living quarters requires external suitports, allowing crew members to enter spacesuits directly through rear hatches mounted to habitat walls. Biological Subsistence, Low Gravity, and Isolation (4:48) Food production presents formidable agronomic challenges despite available water ice at the poles. Martian regolith is alkaline, lacks fixed nitrogen, and requires intensive chemical washing to remove toxic perchlorates before being conditioned with recycled biological waste. Closed-loop aquaponics combining fish and crops offers an alternative method to supplement nutrition and improve crew morale, but agricultural self-sufficiency remains distant. Physiologically, Mars exposes inhabitants to 38% of Earth's gravity, which Kurzgesagt warns triggers muscle atrophy, bone demineralization, and cardiovascular decline that can only be partially mitigated by strict daily exercise routines. Compounding these physical hazards are psychological strains: crews must endure years confined in windowless tunnels, repeating maintenance routines under sensory deprivation with minimal contact with Earth. Like submarine crews or Antarctic winter-over personnel, candidates require extensive psychological screening to survive prolonged confinement. The Fragile Two-Year Earth Supply Chain (6:43) Even if an initial outpost functions for decades, it remains entirely reliant on Earth for replacement components, nuclear fuel, food supplements, and personnel rotations. Orbital mechanics dictate that favorable transit windows between Earth and Mars open only once every two years across tens of millions of kilometers. This rigid timetable makes emergency responses impossible. If a catastrophic systems failure or logistical breakdown occurs at the outpost, relief missions cannot be dispatched on demand, meaning rescue crews could arrive only after an isolated colony has already perished. Kurzgesagt concludes that establishing Phase Two of Martian colonization is among the most brutal undertakings humanity could attempt. However, the publisher suggests that overcoming these initial hardships is the mandatory prerequisite for establishing space manufacturing, orbital hubs, and long-term terraforming.

精炼阅读摘要

Kurzgesagt指出，尽管火星常被视为人类建立首个地外永久殖民地乃至进行地球化改造的天然跳板，但建立半永久性前哨站的实际过程将面临极端严酷的物理与生理限制。从微弱的能源、致命的辐射到有毒的土壤，拓荒者必须在高度孤立与极低容错率的环境中求存，而这一充满危险的尝试也是人类成为多行星物种必须跨越的残酷门槛。能源匮乏与加压栖息舱的工程挑战 (1:43) 火星表面环境极为恶劣，前哨站面临的首要物理制约是严重的能源短缺。火星与太阳的距离使得其表面接收到的太阳能仅为地球的40%，且这一微弱的光照还会频繁被持续数天的全球性沙尘暴遮蔽。由于火星大气密度仅有地球的约1%，风力涡轮机无法产生有效动能；加之火星内部核心过于寒冷，地热能开发同样不具可行性。在初期阶段，常规可再生能源无法支撑基地运转，唯一的现实途径只能是从地球跨越深空直接运送核反应堆及其核燃料。在维持呼吸与气压方面，火星大气主要成分为二氧化碳，栖息舱内部必须人工维持氧气与氮气的混合气压。由于舱内外存在巨大的压力差，传统建筑常见的直角和平面结构会成为结构受力的脆弱断裂点。因此，前哨站建筑必须采用圆滑流线型的无角化构造，并配备绝对可靠的气密锁系统，以确保栖息舱在巨大的内外压差下不发生结构性破裂。空间辐射屏障与有毒微尘防护机制 (3:04) 火星由于缺乏内在磁场与致密大气层的保护，深空辐射可直接穿透半数到达地表，使地表人员承受相当于地球50倍的辐射剂量。宇航员仅在火星表面停留三年，所吸收的辐射量就会超过NASA为其整个职业生涯设定的终身安全上限，极大增加患癌风险。为构建有效的被动辐射防护，栖息舱需利用火星大气中的二氧化碳冻结成厚重的干冰外壳，并覆以一米厚的火星土壤。这种防辐射手段虽然能使室内辐射降低到可存活水平，却会导致居住空间沦为完全无窗的暗色隧道，从外部看宛如土葬坟冢。致命的威胁还来自细微的火星尘埃。火星粉尘比地球沙粒更细，在极端干燥环境中带有很强的静电，极易黏附在宇航服与设备上并渗透破坏机械齿轮。更为严重的是，火星土壤含有高浓度的有毒高氯酸盐，长期吸入极具致命性。为避免将有害微尘带入生活区，宇航服需设计为直接挂载于基地外墙，宇航员通过背部舱门进出服装，使受污染的织物始终与室内隔离；同时，绝大多数日常地表作业需交由远程操控漫游车完成。闭环农业困境与低重力身心损耗 (4:48) 前哨站若选址在极地附近，水资源可通过开采厚冰层获取，但食物补给面临严峻的农艺障碍。火星土壤呈碱性且完全缺乏植物生长所必需的固定氮化合物，清除其中的有毒高氯酸盐是一项极度耗能且缓慢的过程，即便清洗完毕，仍需拌入经过回收的人类排泄物方能播种。相较之下，同时培育鱼类和农作物的封闭式鱼菜共生系统更具可行性，能为长期驻留的人员提供新鲜营养与心理慰藉。火星重力仅为地球的38%，长期处于低重力环境下会导致渐进性的骨质流失、肌肉萎缩及心血管系统机能退化。在研发出旋转离心式居住区之前，宇航员必须每天强制进行高强度锻炼以延缓身体衰败。此外，宇航员需在狭小、无窗的密闭空间中与相同的人员朝夕相处数年，承担单调且高度紧张的维护任务。这要求前哨站候选人必须通过类似南极科考站或潜艇部队那样的极端心理测试，以剔除无法承受长期感官剥夺与精神孤立的个体。脆弱的两年补给链与多行星愿景 (6:43) 火星前哨站在建立后预计可运转数十年，但其运行完全受制于来自地球的物资生命线，包括备用零件、核燃料、轮换队员以及特种耗材。受行星轨道机械运行规律制约，地球与火星之间的有利发射窗口每两年才出现一次，期间相隔数千万公里。这种极端的空间与时间跨度使得补给链极其脆弱，一旦基地突发严重灾难，地球在下一次窗口开启前根本无能为力，后续救援人员抵达时可能面对的是全员覆灭的惨剧。 Kurzgesagt指出，虽然建立第二阶段火星前哨站堪称人类历史上最残酷、最凶险的工程，但人类对极限边疆的开拓本能让这一计划变得无法抗拒。一旦人类克服这一阶段的生死考验，便将真正解锁多行星文明的未来，为后续火星城市建设、轨道太空制造网络搭建，以及漫长的火星地球化改造铺平道路。 Kurzgesagt总结认为，在当前技术条件下建立火星前哨站并非浪漫的探险，而是一项伴随极高死亡风险、严重资源依赖与恶劣生存压力的极限挑战。然而，正是这种直面残酷环境的基础设施开拓，构成了人类打破单一行星物种生存局限、迈向多行星未来的必由之路。

Source quotes

[6:43] Steve Taylor: If there's an emergency in the colony, Earth wouldn't be able to help until the next travel window opens. Helpers may arrive on a planet filled with corpses. [4:48] Steve Taylor: Mars has only 38 percent of Earth's surface gravity, which could cause muscle-wasting, bone loss, and cardiovascular problems.

Original transcript

[0:00] From hostile deserts, to lonely islands and the highest mountains, [0:04] wherever there is space to expand into humans do so. [0:08] So, it's hardly surprising that we're already making preparations [0:11] to set foot on Mars, [0:13] and to create the first permanent colony outside of Earth -- [0:16] maybe even terraform another planet and turn it into a second blue home. [0:21] But wait, [0:22] before we can get to the nice future stuff, [0:25] we first have to complete the second phase of colonization; [0:28] creating a semi-permanent outpost [0:30] to prepare the ground for a larger human presence. [0:33] But doing so will be gruesome. [0:46] Even for an expansionist species like us, Mars is extreme. [0:51] At first glance, Mars seems familiar -- [0:54] polar ice caps, large valleys, [0:56] liquid water under its surface, [0:58] and a day barely longer than Earth's. [1:00] The ideal place for us to go. [1:03] Unfortunately, Mars is actually a cold, radioactive desert [1:07] where the ground is poisonous and breathing is impossible. [1:11] Mars is awful. [1:13] You almost certainly don't want to go there. [1:16] The pioneers doing the hard work on Mars will have an intensely stressful life, [1:20] filled with incredibly challenging problems [1:23] never encountered before. [1:25] But there are plenty of people willing to do that work [1:28] and we have the technology to enable them to do it. [1:31] For this video, we will assume there have been prior missions to Mars [1:35] to scout out a good place for an outpost, [1:37] store resources and equipment, [1:39] and that there's already a moon base [1:40] that serves as a hub for Mars missions. [1:43] The first major challenge for our outpost, [1:46] is the fact that Mars is very energy poor. [1:49] Because of its distance from the Sun, [1:51] solar power is only 40% as effective as on Earth. [1:55] But even this weakened sunlight is often obscured for days [1:58] by enormous dust storms. [2:01] Solar power alone will probably not be enough. [2:04] Alternatives, such as wind power, and geothermal energy are also unfeasible [2:09] as there's hardly any atmosphere and Mars' interior is much too cold. [2:14] Initially, nuclear technology might be the only option. [2:18] Since Mars doesn't have easily accessible radioactive elements, [2:21] the nuclear fuel needs to come from Earth along with the reactor. [2:25] If we do set it up, it could power our small outpost for the first few years. [2:30] Unfortunately, all that energy won't be very useful if we can't breathe. [2:35] Mars' atmosphere is only 1% as dense as Earth's, [2:38] and mostly made up of CO2. [2:40] So, now habitats need to be pressurized and filled with an artificial atmosphere [2:45] made of nitrogen and oxygen -- [2:47] Which comes with more problems. [2:49] Corners and flat walls are weak points [2:51] so the habitats will have rounded and smooth shapes [2:54] to handle the stress of great pressure differences between the interior and exterior. [2:59] The airlocks need to be very airtight and work perfectly every time. [3:04] Without an extensive magnetosphere, or a dense atmosphere, [3:07] half of all radiation coming from space reaches the ground. [3:11] A person on the surface would be subjected to 50 times the radiation that they would be on Earth. [3:16] Three years on the surface of Mars exceeds the radiation dose limits [3:21] imposed on NASA astronauts for their entire career. [3:24] This increases cancer risks significantly. [3:28] To prevent that, we could shield our habitats with a thick layer of frozen CO2, [3:33] that can be harvested directly from the atmosphere. [3:36] Covering the dry ice with a meter of dirt, would further increase the level of protection. [3:41] Sadly, this means almost no windows. [3:44] From the inside, most living spaces will be windowless tunnels. [3:48] From the outside, they'll look like burial mounds. [3:51] All of this would still not hold back all the radiation, [3:54] but reduce it just enough to be survivable for long periods of time. [3:58] It won't, however, protect anyone who ventures outside. [4:02] So, remote-controlled robots will be used for routine work on the surface, [4:06] while our crew stays inside. [4:08] Staying inside is a good idea for another reason: [4:11] Mars dust. [4:12] It's much finer than dust on Earth, [4:14] so it could find its way into the gears or electronics of our machines. [4:18] Because it's also very dry, it's electro-statically charged; [4:22] sticking to everything, like spacesuits. [4:25] It will be impossible to avoid carrying lots of Mars dust into our habitat, [4:29] and into the lungs of our crew. [4:31] To make this even worse, Mars' soil is filled with very toxic perchlorate salts. [4:37] Constant exposure could be deadly. [4:39] This problem can still be overcome though. [4:41] Space suits, for example, could be made in a way that they never truly enter the base, [4:45] but stay attached to the outside of the habitats. [4:48] Okay, great. [4:50] Now we've safely isolated humans in terms of energy and air, [4:54] and protected them from cancer, we just need to feed them. [4:58] Water is easy to come by if a settlement is positioned near the Martian poles [5:02] with their thick layers of ice. [5:03] Growing food is a different kind of challenge though. [5:07] Mars' soils are alkaline [5:09] and lack the vital nitrogen compounds that plants need to grow. [5:14] Before we can grow anything, we will have to decontaminate the soil [5:17] which is difficult and expensive. [5:20] Then, the soil can be fertilized using recycled biological waste. [5:24] All of this will take a lot of time, and is very energy-intensive. [5:28] So, we might use aquaponics to raise fish and plants together -- [5:32] Making the astronauts' diets more varied and tasty at the same time. [5:37] This will be an important psychological boost for our overworked crew. [5:42] All of these things don't solve one fundamental problem though: [5:45] Mars has only 38 percent of Earth's surface gravity, [5:49] which could cause muscle-wasting, bone loss, and cardiovascular problems. [5:54] While this might be solved in the future by setting up rotating living spaces, [5:59] for now, our crew has to live with low gravity [6:01] and exercise a lot to slow the degradation down. [6:05] The crews will probably have to rotate every few years, [6:09] after being stuck indoors in tight spaces without windows. [6:12] With the same people, performing the same routines day-in day-out [6:16] with little contact from the outside world, [6:18] and a lot to worry about. [6:21] Like Antarctic scientists or submarine staff, [6:24] they will undergo intense psychological screening [6:27] to make sure they're mentally resilient enough to handle this lifestyle for several years. [6:31] Establishing the first real infrastructure on Mars will be extremely taxing work [6:36] that only a group of very determined, and competent, people can do. [6:41] Luckily, we have enough of these on Earth. [6:43] And there you have it! [6:45] A small Mars base that will survive for at least a few decades -- [6:49] as long as it's getting a constant supply of resources, [6:52] parts, nuclear fuel, and crews from Earth. [6:56] Unfortunately, Mars and Earth are separated by millions of kilometers [7:00] and orbital periods that leave only a narrow travel window every two years. [7:05] If there's an emergency in the colony, [7:07] Earth wouldn't be able to help until the next travel window opens. [7:11] Helpers may arrive on a planet filled with corpses. [7:15] Settling Mars will be the toughest challenge we have ever faced. [7:19] It will be gruesome work to establish the infrastructure we need. [7:23] But we're stubborn, and we like extreme challenges. [7:26] If we push through Phase Two of colonization, anything is possible. [7:30] Cities illuminating the dark Martian night, [7:33] a hub for travel between the planets, [7:35] industries setting foot in orbit [7:37] terraforming a true multi-planetary future. [7:41] Going to Mars is hard but worth it. [7:44] And if we're lucky, we might be around long enough to see it happening [7:48] and cheer on the people who take on these challenges [7:51] for the benefit of us all.